A new 302-hp 3.5-liter V-6 combines numerous advances to deliver more torque over a wider range of rpm. Its rapid-multispark ignition fires up to four times per millisecond, while new high-pressure Direct Injection microscopically tunes the fuel spray, reducing emissions, fuel consumption and noise. A lightweight diecast-alloy block, quicker and more widely variable valve timing, reduced friction, and clever "on-demand" ancillary components like the alternator further boost efficiency